Airbag control unit with part number A9064460642

What does the airbag control unit A9064460642 do?

The airbag control unit A9064460642 is the central control unit of the restraint system (SRS) for Mercedes-Benz. It evaluates the signals from the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The monitoring covers the sensors, the firing circuits and the lines to the warning light. If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster.

After an accident, the control unit stores crash data and locks itself. The unit also records the part number Bosch 0285010055 on its housing.

Why does the control unit A9064460642 fail?

Stored crash data is the most common cause on the A9064460642, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data remains stored in the unit, and a normal diagnostic tool cannot erase it. An accident without an airbag deployment therefore still leads to a malfunction in the unit.

The other causes lie in the electronics and the connections. Components age, solder joints can go cold, and moisture or corrosion attack the plug connections. Voltage spikes, for example from a weak battery or a jump start, can also overload the electronics.

How can you tell that the A9064460642 is defective?

A defect on the A9064460642 shows up as the airbag warning light, as an error message in the instrument cluster, as a diagnostic tool without a connection to the control unit, and as a fault memory that cannot be cleared.

• Airbag warning light lights up constantly or intermittently
• Error message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

In a critical situation, the airbags and seatbelt pretensioners may not be able to deploy with such a unit. The warning must therefore be taken seriously.

Which vehicles is the A9064460642 fitted in?

The airbag control unit A9064460642 is fitted in these vehicles: Mercedes-Benz Sprinter W906 (2006-2018).

The following list shows the vehicles assigned to this part number.

• Mercedes-Benz Sprinter W906 (2006-2018)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. Also have the fault memory read out beforehand, because only that result shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 000 446 06 42 (06), 0285010349, 0285011060, 285010054, 285010349, 285011400.

How does the repair of the A9064460642 work?

First have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit, create a repair order online and send the unit in, well packed. Processing at Airbag24 usually takes 3–4 working days.

The removal only takes place once the battery is disconnected. This is prescribed for safety reasons.

Airbag24 tests the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Your own unit is then returned to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit A9064460642 get to Airbag24?

You send the control unit A9064460642 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order in the parcel and pack the unit shockproof.